The 27-year-old is the woman who has finally tamed her "The Rum Diary" co-star, say her friends

"Amber has called the shots since day one, dictating when they went public, for example. She's half his age and that's part of why he'll do whatever she wants in order to keep her," contactmusic.com quoted a source as saying.

"He has definitely toned down his behaviour since he started dating Amber. He acts like a mature and charming man now," said another source.

Depp, 50, has daughter Lily-Rose, 14, and son Jack, 11, with former partner Vanessa Paradis. He is said to have popped the question to Heard recently.